dongjoon-hyun commented on a change in pull request #23429: [SPARK-26432][CORE] 
Obtain HBase delegation token operation compatible with HBase 2.x.x version API 
URL: https://github.com/apache/spark/pull/23429#discussion_r245351590
 
 

 ##########
 File path: 
core/src/main/scala/org/apache/spark/deploy/security/HBaseDelegationTokenProvider.scala
 ##########
 @@ -50,12 +53,70 @@ private[security] class HBaseDelegationTokenProvider
       creds.addToken(token.getService, token)
     } catch {
       case NonFatal(e) =>
-        logWarning(s"Failed to get token from service $serviceName", e)
+        logWarning(s"Failed to get token from service $serviceName" + "Trying 
to invoke" +
 
 Review comment:
   `$serviceName" + "Trying` -> `$serviceName. Trying`?

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